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C. H. BUSCH.

STAVE FOR SILOS AND THE LIKE.

APPLlCATlON FILED JULY 18, 1918.

Patented Nov. 4, 1919.

2 SHEETS-SHEET I.

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c H. BUSCH. STAVE FOR SILOS AND THE LIKE.

APPLICATION FILED IULY I3. I918.

Patented NOV. 4, 1919.

2 SHEETS-SHEE] 2.

wan 000% CHARLES H. BUSCH, 0F WICHITA, KANSAS.

STAVE FOR SILOS AND THE LIKE.

To all whom it may concern:

Be it known that I, CHARLES-H. Boson, a citizen of the United States, residing at Wichita, in the county of Sedgwick and State of Kansas, have invented new and useful Improvements in Staves for Silos and the like, 'of which the following is a specification.

This invention relates to concrete silo constructiOns and particularly to staves therefor having locking features, and the main object of the invention is to provide cement or concrete staves having corresponding side edges and end structural features which when associated will provide for positive and reliable interlocked and completely sealed or air-tight joints after a cement wash or filling is applied to the inner portions thereof and whereby an absolutely true'and interiorly smooth silo surface will be formed, the end joints being such that the usual form of outer silo bands will pass over and catch the ends of each two staves extending above and below the bands throughout the traverse of the bands and thereby sustain and reinforce these stave end joints and materially strengthen the general silo structure.

The invention consists in the construction and arrangement of the several parts which will be described more fully hereinafter'and pointed out in the appended claims.

In the drawings Figure 1 is an elevation of a portion of a silo or other structure, looking at the inner side, and showing the improved staves in part covered and filled at the joints and inpart with the joints as they appear before application of the covering or filling.

Fig. 2 is an elevation of a portion of a silo or other structure, looking at the outer side, and embodying the improved staves and illustrating parts of two-of the outer hands over the end joints of the staves.

Fig. 3 is a longitudinal section taken in the plane of the line.3'3, Fig. 1. 1

Fig. 4 is a transverse section takenin the plane of the line 4 4, Fig. 2, and showing -one of the outer bands in place over the end joints of the staves. Fig. 5 is a detail Perspective view of one of the staves looking toward the outer side thereof.

Fig. 6 is a detail perspective view of one I Specification of Letters Patent.

Application filed July 18,

Patented Nov. d, 1919.

1918. Serial No. 245,527.

of the staves looking toward the inner side thereof.

Figs. 7 and 8 are detail views of the improved staves slightly modified for starting, nishing, and door and window frame fitting purposes. V

The numeral 5 designates the improved stave having suitable dimensions that may ing the full length thereof, and the opposite side edge is formed with a convex rib 7 also extending the full length thereof, the side I edge groove and ribs of adjacent staves being complemental so that the rib of one stave will closely fit in the groove of an adjacent stave. The one end of the stave is formed with a central arcuate socket 8 having a spherically concave dip 9 providing the'maximum depth portion of the socket, and the opposite end of the stave has a central arcuate tongue 10 having a convex edge 11 with a spherically shaped apex 12 to fit a complemental socket and. dip at the end of an adjacent stave. The inner sideedge portion or margin of each stave is formed witha channel 13 extending the full length of the stave and intersecting end channels 14 which continue completely across the stave, and the inner edge walls of these channels have an undercut bevel, ?as at 15. The channels 1 1 and 15 undercut bevels at the ends follow or correspond to the contour of the respective ends, as clearly shown by Fig. 6. The rib 7 starts at the two opposite sides of the stave from a point in the other device.

staves to receive a filling or wash of cement which is keyed over the joints by the undercut beveled walls of the channels, the seats being flushly filled with the material applied thereto and forming aSlnOOth inner finish to the wall and also tightly sealing the joints and rendering them air-tight which is very important in silo constructions. Another material advantage of the stave construction is that the usual bands 17 applied around the outer side of a silo structure will extend over and engage the tongues 10 and a portion of each stave on opposite sides of the central socket 8, thereby serving to strengthen the joint and hold th staves in assembled relation and generally reinforce the silo construction.

igs. 7 and 8. show half or sectional staves 18 and 19 respectively formed as starting .and finishing staves, or, staves to provide a straight Wall edge around a door or other openin to receive a door frame or T iese starting and finishing staves each have a straight end edge 20 at one end, the opposite end of the stave 18 having a tongue 10, and the opposite end of the stave 19 having a socket 8, similar to the tongues and sockets heretofore described. The staves 18 and 19 in other respects are grooved, ribbed and channeled similar to the main stave The straight end edges of the staves 183 are adapted to rest on the base of the silo with the tongues 10 uppermost, as shown-by? Fig. 1, and the staves 19 are disposed asthe topmost row of staves with sockets down and the straight end edges uppermost to provide top finishing staves for proper and close fitting of a roof structure or device.

An important advantage of the improved stave is that each stave is a counterpart of the-other and they may, therefore, all be readily molded and produced with less expense, and, in assembling the staves, it is unnecessary to adopt any tedious method in fitting the same together as they will all be similar and may be readily adjusted one with relation to another. By providing the sockets 8 with the dips 9 and correspondingly shaping the convex edges 11 of the tongues 10 or providing them with spherical apices, a more positive seating of the tongues in the sockets Will result and the joints thus produced will have a stronger interlocked relationship by reason of the additional penetration of the apices of the tongues into the dips and the counterbalancing by the convex edges of the tongues at each side of the apices against and in conjunction with the corresponding portions of the socket walls at each side and around the dips. The spherical apices of the tongues also coact with the sockets 8 having the dips 9 to maintain the staves against ready displacement when they are set up in an end to end association, and, moreover, the said spherical apices and dips in which they are fitted operate to center the staves without requiring any adj ustment or movement to insure a perfect alinement of the inner and outer surfaces of the staves after said staves are arranged in engaging positions. This particular structure combined with the alternate side ribs and grooves of the staves insures a positive disposition of the staves when assembled and sets up sufficient resistance to displacement to permit the application of the cementitions material to fill the joints and complete the inner sure face of the silo. It is obvious that an end joint without some means to resist inward and outward pressure will have a tendency at all times to slip the joints out of place with considerable annoyance and delay in the erection of a silo, and hence the tongues and the sockets in the ends of the staves are respectively formed with the spherical apices and correspondingly shaped sockets. These spherical apices of the tongues and the dips of the sockets also provide for the formation of a more perfect air-tight joint in that it is obviously more difiicult for the air to pass through a joint of this character than it would be through a joint that extends through or without the spherical apices and dips. The air-tightness of the assembled staves at the points where the spherical apices of the tongues and dips ot' the sockets and the horizontal portions of either side of the latter meet is rendered practically effective when the end channels 14: have the filling or wash of cement applied thereto as hercinbefore specified. In assembling the improved staves in a wall structure, it will be understood that, aside from the particular mode of jointnre as hereinbefore explained, the ordinxry methods will be used in securing the same. care being taken, however, to have all of the joints smooth and the inner side portions of the joints flush with the inner sides or faces of the staves.

What I claim is:

i 1. A stave of the class specified consistmg of a body having a rib along one side edge and a groove extending full length of the opposite side edge, one end of the body having a centrally located concave socket with a dip of a spherical contour and providing the maximum depth of the socket at the center, the opposite end of the body having a central arcuate tongue with a convex periphery and an apex of spherical form .to extend into and snugly fit the spherical dip of the socket of an adjacent stave to resist ready displacement of the associated stave ends and provide a practical air-tight joint, the inner side of the body having a marginal channel along the side edge with the groove therein and also across the ends, the wall of thechannel being formed withan under cut of bevel and of the same contour as the edges of the side and ends of the body in which it is tongue having a maximum relative extension at the center there0f,fthe socket and tongue having a corresponding contour, the inner side of the body having a marginal channel extendin along the grooved side edge and across t e ends and following the contour of said side edges and ends, the inner limiting Wall of the channel being formed with an under out bevel.

3. Staves for silo construction, each consisting of a body having parallel side edges respectively formed with a concave groove and a convex rib and the ends respectively formed With a central concave socket and a central arcuate tongue, the socket having a central dip and the tongue provided with a spherically-shaped apexprojecting beyond the marginalside portions of the tongue as defined at opposite sides ofthe stave, the central dip of the socket and the central projecting a ex'of the tongue form ing a central concea ed engaging mean'sibe tween the blockends having a greater struc-.

tural extent than the outer and inner side portions of the socket and'tongue, the end tongues and sockets and the side edgeand grooves of adjacent staves closel interfitting and the tongues havmg suc relative outer surface exposure as to dispose them and the parts of the staves at opposite sides portions of the staves respectively 'side and end channels of the tongues and sockets for,engagement bythe usual silo reinforcing bands, the edge at opposite sides of the sockets and tongues being horizontally straight, the inner side of each stave along the edge with the rib and across the ends having nelgwith inner undercut beveled walls, the 0f the assembled staves conjointly formingfineans for receiving a cementitious filling flush With the inner sides of the bodies of the staves tb provide a smooth and tru inner silo wall and air-tight joints between the staves.

4 Ina silo tructure, the combination of main staves for use between the base and upper finishing courses of the silo, said main staves each having a groove and a rib at opposite sides and a tongue and socket at opposite ends, the tongues being of spherical intersecting chahform at the centers thereof and the sockets having correspondingly shaped dips to receive the said spherical portions of the tongues, base starting and top finishing stavesrespectively having the tongue and sockets of the same form as the tongues and sockets of the main staves and solely provided at one end of each, the opposite ends of the starting and finishing staves being straight, the tarting and finishing staves also having grooves and ribs at the opposite side edges.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CHARLES H. BUSCH. "Witnesses:

ELLEN CLAYPOOL, G. G. TUCKER. 

